Hi John, the reason we will not use BGA is we fitted a bga water pump and dayco timing belt kit to a disel Vectra ( JTD engine) 6months later and 9k the water pump seized ,melted the cam belt and the result was an £1100.oo repair bill .It took 8 months but I did get paid ,Half from bga half from pages . As you say its not the first,Stick with it.
Steve Sneap